Here is a definitive list of codepoint values, delimiter names and, where applicable,
system variables that can be used to access them.
Code Name.......... Variable Name
255 Segment Mark
255 Item Mark (@IM)
254 Field Mark (@FM)
254 Attribute Mark (@FM)
253 Value Mark (@VM)
252 Sub-Value Mark (@SM)
(@SVM)
251 Text Mark (@TM)
250 (no name)
249 (no name)
248 (no name)
"Item mark" separates key from non-key data within the physical record.
"Field mark" was the Prime name, "attribute mark" is from Pick.
"Text mark" is so called because it is the character inserted when "T" formatting is
used, to indicate a break at this point if the data are longer than the width
specified. It is also used (therefore) by the query engine to trigger "wrap around"
of data in columns. I do not know why it was chosen as the default separator
character in multi-column primary key implementations in UniVerse/SQL.
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